＊1： Correction of rated torque and max. torque due to load fluctuation is not required. However, if ambient temperature exceeds 30°C, be sure to correct the rated torque and max. torque with temperature correction factor shown in the following table.

There are four types of sleeve hardness. Please select desirable units according to usage conditions including torque and misalignment.

Since the sleeve's vibration absorption of Tight Fit can raise the gain of a servomotor, this unit can achieve high responsive operation exceeding the Disk coupling.

Easy fit allows you to assemble and partition the hub and sleeve smoothly. This allows you to reduce the time of assembling the unit and maintenance.

Sleeve Type

Application

Machine tool / Spindle

Selection

Selection Based on Shaft Diameter and Rated Torque

The area bounded by the shaft diameter and rated torque indicates the selection size.

Selection Example

In case of selected parameters of shaft diameter of φ 18 and load torque of 16 N•m, the selection size forMJB-＊＊-BLMJB-＊＊-EBLis MJB-55-BLMJB-55-EBL

Ambient Temperature / Temperature Correction Factor

Ambient Temperature

Temperature Correction Factor

-20℃ to 30℃

1.00

30℃ to 40℃

0.80

40℃ to 60℃

0.70

Sleeve Details

Slip torque

As in the table below, the bushing type MJB has different slip torque according to the bore diameter. Take care during selection.

Unit : N・m

Part Number

Bore Diameter (mm)

10

11

12

14

15

16

18

19

20

22

24

25

28

30

32

35

38

40

42

45

48

50

MJB-55

32

54

75

110

130

MJB-65

160

170

180

200

210

220

240

260

270

300

320

340

370

MJB-80

280

330

380

410

480

500

500

500

500

500

500

500

MJB-95

500

500

500

500

500

500

500

500

500

500

500

These are test values based on the conditions of shaft dimensional allowance: h7, hardness: 34-40 HRC, and screw tightening torque of the values described in MJB dimension tables. They are not guaranteed values.
Slip torque changes with usage conditions. Carry out tests under conditions similar to actual conditions in advance.

Change in static torsional stiffness due to temperature

This is a value under the condition where the static torsional stiffness at 20°C is 100%.
Changes in the static torsion spring constant within the operating temperature are shown in the graph.
Before using the unit, be aware of the deterioration of responsiveness.